Armature-winding



J. A. KUYSER.

ARMATURE WINDING.

APPLICATION FILED APR.l6,1913.

1,382,987, Patented June 28, 1921.

2 SHEETS-SHEET 1.

- WITNESSES:

J. A. KUYSER.

ARMATURE WINDING.

APPLICATION FILED APR. 16. mm.

1,382,987, Patented June 28, 1921.

2 SHEETSSHEET 2.

WITNESSES: I INVENTQR 354. 5% & Jmflrfiiurfiys'elf IE-SW j UNITED STATES PATENT oFFIcE.

JAN ARTHUR xursnn, or EDGEWOOD, rmsynva'mn, assrenon. To Wnsrma noose ELECTRIC AND manoracrumne oomrm, A oonronarron or PENN- Allegheny and State of SYLVANIA.

To all whom z't-may concern:

Be it knownthat LoIAN ARTHUR KUYSER, a subject of the ruler ofithe Netherlands, and a resident of Edgewood in the county of Pennsylvania, ave invented a new and useful Improvement in "Armature-Windings, of which the following is-a specification.

My invention relates to dynamo-electric machines, and it has special reference to means for interconnecting the armature 0011s of such machines.

One object of my invention is to provide means for reducing, as much as possible, a

part of the load losses, that is, the copper eddy current losses, in dynamo-electric machines carrying conductors of comparatively lar e cross-section.

nother object of my invention is to rovide means of the above-indicated character which shall be simple in form, inexpensive to construct and easy to install and repair.

Heretofore, in the operation of dynamoelectric machines having conductors of comparatively large cross section, heavy eddy currents occurred in' the portions which were embedded in the. iron, particularly if the conductors were made entirely solid. A means of partially overcoming the difliculty is to divide each complete conductor into several parallel conductors lightly insulated from each other. However, evenwhen said means is employed, a large proportion of the load losses still remains.

According to my present invention, I provide a plurality of independent sets of special connectors for progressively, and in dififerent combinations, connecting together the several parallel conductors or sections of which a sin le complete conductor is composed. The a ova-mentioned load losses are thereby practically eliminated, as will be understood from the following theoretical considerations.

As is well known to those skilled in the art, the voltage generated in a conductor varies throughout its depth. Consequently, local circuits are set up within the conductor which constitute a part of the load losses. Hence, the old idea of sectionalizing the conductors. However, with the former usual plain interconnections between coils, much of the advantage gained by the sectionalizing was lost. I provide sectionalmawunE-wm'nme.

Specification of Letters Patent.

Patented June 28, 1921.

Application filed April 1c, 1913. Serial no. 761,5143.

Q ized end connectors between coils, and cause said connectors to join sections lying at dlfferent distances from the surface of the core member in accordance with a predetermined rule so that there is provided, throu h the wmdmg, a plurality of separate pat s, each of whlch includes the same number of actlvecoil conductors, and in each of which there 1s generated the same total electromot1ve force. I thereby eliminate the greater portion ofthe eddy currents in the armature conductors and reduce the load losses to a negligible amount.

In the accompanying drawings, Figure 1 1s a diagrammatic plan view, in development, of one complete group of armature coils conforming to my invention; Fig. 2 is a diagrammatic View showing solely my special end-connectors as applied to the coils coils 1 are disposed inthe s ots of the core 2 of a dynamo-electricmachine 3, and have the usual overhanging and intercrossing end portions 4 which are supported in any suitable manner. Each coil 1 comprises a 'single conductor having a plurality of parallel sections 5, preferably lightly insulated from each other.

In order to obtain the above-mentioned progressive combinations of the sections 5 of the several coils 1, I employ a plurality of forms of end-connecting sets 6 and 7, respectively, which severally comprise a plurality of preferably insulated sections 8 equal in number to the sections 5. The connector sets 6 and 7 are severally attached, in any suitable manner, to the sectionalized ends 9 of the longitudinally adjacent overhangingportions 4 of predetermined pairs of coils. For instance, connectin -sleeves 10, suitably insulated from each ot er, may be employed. The system of connections may best be understood by reference to Figs. 1 and 2, in which a specific case is illustrated.

. The coils 1 are of one turn each and two coils are disposed in each slot. The terminals 12 of the' group 11 project outwardly for making connections to a machine term1- I nal or to other correspondin groups of coils (not shown). The longitu inally-disposed ends 9 of predetermined pairs of the mtercrossing end portions 4 of the coils 1 are severally disposed in radial planes, as is customary. It will be seen that a repeatmg series of two of the end-connect' sets 6 and one of the end-connecting sets is employed on the machine in uestion. Thus, each parallel path through t e group 11 includes equal numbers-in this particular case threeof the various sections 5 of the coils 1, The advantages of such a system of connections have hereinbefore been pointed out.

Referring to Fig. 5, the four conductors lying in the upper portions of the slots 1 to 12, inclusive, are indicated in the left hand portion of the diagram and, in like manner, the four conductors lying in the lower ortions of the slots 23 to 34:, inclusive, are lndicated in the right-hand portion of the diagram. The current-conducting lead 36 is subdivided into four component conductors which traverse the upper portion of the slot 1, reverse at the back of the armature and traverse the lower portion of the slot 23. In like manner, said four conductors successively traverse the upper ortion of the slot 2, the lower portion of t e slot 24, the upper portion of the slot 3 and the lower portion of the slot 25, performing a simple reversal in the end connection in each instance. Between the conductors lyin in the lower ortion of the slot 25 and t ose lying in t e upper portion of the slot 4, I insert one of my special end connectors so that the upperconductor of the grou lying in the lower portion of the slot 25 15 connected to theupper conductor of the group lying in the upper portion of the slot 4, the remaining conductors performing a simple reversal. A similar special end connector is inserted in the end connector associated with each third slot until theentire twenty-four slots in question are traversed and the four conductors are again joined to the lead 37 Thus, it wlll be noted,

if the eight possible conductor positions in a slot be designated respectively as 1' to 8, inclusive, that each of the conductors traverses each of the positions 1' to 8, inclusive, .three times. The course of a single'conductor through the, twenty-four slots is indicated by the solid circles in Fig. 5, whereas the remaining three conductors are indicated b fine circles. Thus, the total reluctance o t e magnetic paths interlinked with each component conductor between the two main current taps is substantially the same, resulting in equal reactance'for each of the four component conductors and, in this way the production of unbalanced voltage and of harmful circulating currents is prevented.

The diagram of ig. 2 illustrates the inventlon 1n greatly simplifiedform, said diagram relating only to the front connectors and show1ng how, in every third slot, the spec1al connector is inserted in order to alter the depth of the immediately succeedmg portion of each'component conductor in the slots in which it may be embedded.

I do notwish to be restricted to the specific structures and details herein set forth, but desire that only such limitations shall be imposed as are indicated in the appended claims.

I claim as my invention:

1. In a dynamo-electric machine, the combination with a slotted armature core member having an armature winding embedded in the slots thereof, said winding being provided with two current taps at points of op-' posite polarity, the portion of said armature winding included between said taps providing a plurality of distinct conducting paths said paths being provided by conductors traversing the same slots in the same order, each of said conductors traversing different slots of said core member at different depths, the resultant reactance of all of said conducting paths being substantially-equal.

2. In a dynamo-electric machine, a slotted armature core member having an armature winding embedded in the slots thereof, said winding being provided with two current taps at points 0 opposite polarity, the portion of said armature windin included between said taps providingndlstinct conduct ing paths, said paths being provided by conductors traversing the same slots of said core member in the same" order,'there being 2Kn conductors in each slot arranged 2n conductors deep, K' being any positive integer, each conductor traversing the same number of slots for each multiple of th of said armature winding at points of opposite polarity, said armature winding providing a plurality of distinct conducting paths progressing around the armature in the same direction between said taps, each of said paths constituting a conductor traversing a like number of said core slots at different depths, the sum of the depths of each conductor in all the slots traversed thereby being substantially equal.

4. In a dyanmo-electric machine, the combination with a slotted armature core member having an armature winding embedded in the slots thereof, of two current taps to said armature winding at points of opposite polarity, said armature winding providing n distinct conducting paths between said taps, each of said paths constituting a conductor traversing the same m armature slots in the same order and said conductors being arranged 2% deep in said slots,- each conduetor traversing the top of 5-2: slots and traversing slots at th of the slot depth JAN ARTHUR KUYsER.

- Witnesses:

W. R. CoLEY,' F. W. STAURT.

the bottom of a different slots, and also and slots at 

